When we look at early Christian buildings and Jewish synagogues, we will focus on the process of architectural adaptation. In the beginning, most Christian groups met 'from house to house', sharing a common meal in the dining rooms of families in their community. Remember that some Roman cults also met in household cells, even when they had built monumental temples. House churches are not visible archaeologically until they have been renovated for use in Christian worship. The renovated houses (sometimes referred to as a domus ecclesiae) would not usually have continued to be used as domiciles.

This plan shows a house unearthed in Dura Europos that had been used as a place of Christian assembly. You can see how a wall has been removed to make a long assembly hall (no longer used for dining, but for seating focused on the front of the hall, and still useful for the symbolic meal, the eucharist). Note also the addition of a baptistry.
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